Personal income tax calculator implemented in Python

# -*- coding: utf-8 -*-
"""
Created on Sat Apr 15 17:55:54 2017
@author: Administrator
"""
#!/bin/env python
# author: zhouhh
# email: ablozhou@gmail.com
# money.py
def money(all_salary,has_welfare,has_housing_fund):
  money = all_salary
  bj_average_salary=3322;#in 2008 using average salary of year 2007
  min = bj_average_salary*0.6
  max = bj_average_salary*3
  welfare_fund = all_salary
  if all_salary > max:
    welfare_fund = max
  if all_salary < min:
    welfare_fund = min
  print("total money=%.2f"%all_salary)
  medical_fund=welfare_fund*0.02+3
  retire_fund=welfare_fund*0.08
  unemploy_fund =welfare_fund*0.005
  if not has_welfare:
    welfare_fund = 0
    medical_fund=0
    retire_fund=0
    unemploy_fund =0
  else:
    print("medical fund = %d*0.02+3=%.2f"%(welfare_fund,medical_fund) )
    print("retirement fund = %d*0.08 =%.2f"%(welfare_fund,retire_fund) )
    print("unemployment fund = %d*0.005=%.2f"%(welfare_fund,unemploy_fund ))
  housing_fund=welfare_fund*0.12
  if not has_housing_fund:
    housing_fund = 0
  else:
    print("housing fund = %d*0.12=%.2f"%(welfare_fund,housing_fund))
  all_welfare_fund=medical_fund+retire_fund+unemploy_fund +housing_fund
  print("all welfare fund=%.2f"% all_welfare_fund)
  money -=all_welfare_fund
  before_tax = money
  print("before tax money =%.2f"%before_tax )
  if before_tax < 2000 :
    print(" you have no tax,you own money=%.2f"%before_tax)
    return before_tax
    #after 2008.3.1 tax
  l1=500*0.05 #2000-2500, %5
  l2=1500*0.10 #2500-4000 %10       +=25
  l3=3000*0.15 #4000-7000 %0.15      +=175
  l4=15000*0.20 #7000-22000 %20     += 625
  l5=20000*0.25 #22000-42000 %25   +=3625
  l6=20000*0.30 #42000-62000 %30   +=8625
  l7=20000*0.35 #62000-82000 %35   +=14625
  l8=20000*0.40 #82000-102000 %40  +=21625
  l9=0                     #  +=29625
  money -=2000
  tax=0;
  if money<500:
    l1=money*0.05
    tax=l1
    print("you are in level 1,tax =%.2f, you own money=%.2f"%(tax,(before_tax-tax)))
    return before_tax-tax
  money -= 500
  if money<1500:
    l2=money*0.10
    tax=l1+l2
    print("you are in level 2,tax =%.2f, you own money=%.2f"%(tax,(before_tax-tax)))
    return before_tax-tax
  money -= 1500
  if money<3000:
    l3=money*0.15
    tax=l1+l2+l3
    print("you are in level 3,tax =%.2f, you own money=%.2f"%(tax,(before_tax-tax)))
    return before_tax-tax
  money -= 3000
  if money<15000:
    l4=money*0.20
    tax=l1+l2+l3+l4
    print("you are in level 4,tax =%.2f, you own money=%.2f"%(tax,(before_tax-tax)))
    return before_tax-tax
  money -= 15000
  if money<20000:
    l5=money*0.25
    tax=l1+l2+l3+l4+l5
    print("you are in level 5,tax =%.2f, you own money=%.2f"%(tax,(before_tax-tax)))
    return before_tax-tax
  money -= 20000
  if money<20000:
    l6=money*0.30
    tax=l1+l2+l3+l4+l5+l6
    print("you are in level 6,tax =%.2f, you own money=%.2f"%(tax,(before_tax-tax)))
    return before_tax-tax
  money -= 20000
  if money<20000:
    l7=money*0.35
    tax=l1+l2+l3+l4+l5+l6+l7
    print("you are in level 7,tax =%.2f, you own money=%.2f"%(tax,(before_tax-tax)))
    return before_tax-tax
  money -= 20000
  if money<20000:
    l8=money*0.40
    tax=l1+l2+l3+l4+l5+l6+l7+l8
    print("you are in level 8,tax =%.2f, you own money=%.2f"%(tax,(before_tax-tax)))
    return before_tax-tax
  money -= 20000
  l9=money*0.45
  tax=l1+l2+l3+l4+l5+l6+l7+l8+l9
  print("you are in level 9,tax =%.2f, you own money=%.2f"%(tax,(before_tax-tax)))
  return before_tax-tax
money(10000,0,0)

total money=10000.00
all welfare fund=0.00
before tax money =10000.00
you are in level 4,tax =1225.00, you own money=8775.00